Access deined - yet another MySQL problem

Recently installed PHP 5.0.2 on Windows Server 2003, MySQL 4.0.xx running on the same machine. I initially installed PHP using the installer, but then downloaded the zip file and extracted the ext folder to c:\php\ext. I have enabled the php_mysql extension in php.ini. I have placed libmysql.dll in c:\windows\system32. I added Everyone as Full Control to the c:\php\ext folder. Yet when attempting to load a page that uses MySQL I get the error: PHP Startup: Unable to load dynamic library 'c:/php/ext\php_mysql.dll' - Access is denied. This appears in the webbrowser. I get a similar error in a messagebox on the server itself. I'm almost certain permissions are set correctly - I can use the Microsoft SQL extension with no problems (enabled it as well in php.ini). Any ideas? Thanks! -- Adam Clauss cabadam@tamu.edu